1. Aim: Why is water such an important molecule?
Do Now: What elements make up water?
Homework: read pages 4-9 in your book and answer any questions on those pages

2. The roles of water on earth
Water influences weather- rain, sleet, snow
Water shapes the surface of the earth- water wears away rock

3. Water supports life- nearly all biochemical reactions need water, water regulates temperature and helps transport substances
Water supports human activities- bathing, cleaning, agriculture

4. Water is a polar molecule
Water is made up of the elements hydrogen and oxygen
Polarity- charges on parts of a molecule, molecules of water attract one another

5. Properties of water Cohesion- water molecules stick together
Adhesion- water molecules stick to other surfaces

6. Aim: Why is water such an important molecule?
Do Now: What does the word cohesion mean?
Homework: Read pages in your book and answer any questions

7. Properties of water
It can absorb large amounts of energy- high specific heat
It dissolves many other things- universal solvent

8. The Water Cycle
Movement of water between the atmosphere, land, oceans, and living things makes up the water cycle

10. Practice:
Read and complete page in your book

11. Aim: How does water change state?
Do Now: What are the three states of matter?
Homework: complete page 25 in your book

12. Key terms Evaporation- when liquid water changes into water vapor
Transpiration- the release of water vapor into the air by plants
Sublimation- when solid water changes directly into water vapor

13. Condensation- change of state from a gas to a liquid
Precipitation- any form of water that falls to the earth from the clouds
Runoff- water flowing downhill into river, lakes, and oceans

14. Infiltration- water seeping into the ground
Practice- complete page 22 with the key terms from the lesson today

15. Aim: How can we practice with the water cycle?
Do Now: Why does evaporation occur?
Homework: page 45 in your book